GPT.h

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/* ========================================
 
  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
 
======================================== */
 
#pragma once
 
#include <FirmwareKit/EFI/EFI.h>
#include <NeKit/Config.h>
 
#define kSectorAlignGPT_PartTbl (420U)
#define kSectorAlignGPT_PartEntry (72U)
#define kMagicLenGPT (8U)
#define kMagicGPT ("EFI PART")  // "EFI PART"
#define kGPTPartitionTableLBA (512U + sizeof(GPT_PARTITION_TABLE))
 
namespace Kernel {
struct GPT_PARTITION_TABLE;
struct GPT_PARTITION_ENTRY;
 
struct PACKED GPT_PARTITION_TABLE final {
  Char     Signature[kMagicLenGPT];
  UInt32   Revision;
  UInt32   HeaderSize;
  UInt32   CRC32;
  UInt32   Reserved1;
  UInt64   LBAHeader;
  UInt64   LBAAltHeader;
  UInt64   FirstGPTEntry;
  UInt64   LastGPTEntry;
  EFI_GUID Guid;
  UInt64   StartingLBA;
  UInt32   NumPartitionEntries;
  UInt32   SizeOfEntries;
  UInt32   CRC32PartEntry;
  UInt8    Reserved2[kSectorAlignGPT_PartTbl];
};
 
struct PACKED GPT_PARTITION_ENTRY {
  EFI_GUID PartitionTypeGUID;
  EFI_GUID UniquePartitionGUID;
  UInt64   StartLBA;
  UInt64   EndLBA;
  UInt64   Attributes;
  UInt8    Name[kSectorAlignGPT_PartEntry];
};
}  // namespace Kernel